United States Department of Transportation
i
Prediction Model of Vibration-Induced Settlement Due to Pile Driving
-
2022-02-01
-
[PDF-11.56 MB]
Details:
-
Creators:
-
Corporate Creators:
-
Corporate Contributors:
-
Subject/TRT Terms:
-
Resource Type:
-
Geographical Coverage:
-
Edition:Final Report May 2019 –February 2022
-
Corporate Publisher:
-
Abstract:This report presents a method for predicting ground deformations caused by impact pile driving, which accounts explicitly for the attenuation characteristics of Central Florida-specific soil conditions. Currently, vibration limits are not linked to the amount of pile driving-induced deformations that soils will experience due to vibrations, which is important when repetitive and cumulative loadings are applied in predominantly sandy soils. The most important variables for the ground response due to impact pile driving operations of the most common deep foundation type in Florida (i.e., 18” to 30” square prestressed concrete piles) are considered: rated energy of the hammer, distance from the pile, pre-drilling, and soil relative density. Field data obtained from different construction sites in Central Florida are used to show ground deformations and their relationships with ground vibration levels. Common construction practices in the area are also analyzed from the reported field data. The analyses were conducted using a combination of field measurements and numerical analyses using with GRLWEAP and PLAXIS 2D. A continuous pile driving modeling approach, in which the pile is installed with a continuous time series of hammer impacts up to the target installation depth, was adopted in the numerical analyses based on comparisons of numerical modeling approaches performed for this report. An advanced constitutive soil model capable of reproducing changes in the void ratio of the soil during pile driving is used in the analyses. Numerical studies of the effects of impact pile driving installation methods on expected ground vibrations and deformations are presented. It is concluded that in cases where vibration levels did not exceed the limit defined by the Florida Department of Transportation (i.e., peak particle velocities not exceeding 0.5 in/s), ground deformations can still occur depending on the above-mentioned site-specific variables. Equations and charts useful for estimating ground deformation envelopes are proposed to provide guidance for researchers and practitioners relating ground deformations, peak particle velocities (PPV), rated energy of impact hammers, and distance away from the pile.
-
Format:
-
Funding:
-
Collection(s):
-
Main Document Checksum:
-
Download URL:
-
File Type:
